activesupport/lib/active_support/json/encoders/object.rb


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require 'active_support/core_ext/object/instance_variables'

class Object
  # Dumps object in JSON (JavaScript Object Notation). See www.json.org for more info.
  def to_json(options = nil)
    rails_to_json(options)
  end

  private
    def rails_to_json(options = nil)
      ActiveSupport::JSON.encode(instance_values, options)
    end
end